#include<iostream>
#include<thread>
#include<string>
#include<condition_variable>
#include<vector>
using namespace std;
class DOP {
public:
	int a;
	int b;
};

class A {
public:
	virtual ~A() = 0;
};
A::~A() {

}

class B:A {

};

int main() {
	std::string str;
	str.c_str();
	std::this_thread::get_id();
	B a;
	int i;
	std::cin >> i;
	int abs = 1;
    int*const p1 = &abs;
	int* const p2 = &abs;
	int* const* p = &p1;
	p = &p2;

	const int* pp1;
	const int* pp2;
	const int** pp=&pp1;
	pp = &pp2;
	std::vector<int>childs(26);
	double aaa = 0.1+0.2;
	std::cout << (aaa == 0.3) << std::endl;

	vector<int>res1(2);
	res1.insert(res1.begin(), {});
	cout << res1.size() << endl;
}